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Fixed a potential crash where we attempt to read 

an invalid register.

<rdar://problem/12065366>

llvm-svn: 161679
This commit is contained in:
Sean Callanan 2012-08-10 18:35:24 +00:00
parent c52863cd36
commit d2a5a90148
1 changed files with 4 additions and 0 deletions
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4
lldb/source/Plugins/Process/Utility/RegisterContextLLDB.cpp
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@ -896,6 +896,10 @@ RegisterContextLLDB::ReadRegisterValueFromRegisterLocation (lldb_private::Unwind
case UnwindLLDB::RegisterLocation::eRegisterInRegister: case UnwindLLDB::RegisterLocation::eRegisterInRegister:
{ {
const RegisterInfo *other_reg_info = GetRegisterInfoAtIndex(regloc.location.register_number); const RegisterInfo *other_reg_info = GetRegisterInfoAtIndex(regloc.location.register_number);
if (!other_reg_info)
return false;
if (IsFrameZero ()) if (IsFrameZero ())
{ {
success = m_thread.GetRegisterContext()->ReadRegister (other_reg_info, value); success = m_thread.GetRegisterContext()->ReadRegister (other_reg_info, value);